Nickel Boron BCG Toolcraft C158

A Toolcraft Nickel Boron BCG is one of the best BCGs on the market today. Precision manufactured on state-of-the-art CNC machinery in North Carolina, Toolcraft AR15 parts are trusted by the U.S. Military and carry a Lifetime Warranty.

A bolt carrier group is only as good as it’s bolt. These bolts are manufactured from Carpenter 158 steel, the same high strength steel specified by the US Military for M16 bolts. See also our 9310 steel Nickel Boron BCG.

Nickel Boron is an extremely durable finish with self-lubricating properties so your AR15 cycles smoother and requires less lubrication. IMO, this may be the ultimate upgrade to the All-American AR15. And it looks good too! See our Nickel Boron BCG Collection.

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A Hypocrites Review

Prior to ordering this BCG I read the reviews and just shook my head in dismay. How could so many reviewers rate this product without having test fired it? Well, here I am, and I'm admittedly quite sheepish. But, upon thoroughly cleaning the BCG and inspecting it under a magnifying lens and a micrometer in hand, I am impressed. This is a finely crafted product, no burrs, or tool marks, and the finish is phenomenal. I have a number of different BCGs, some much more expensive, but none better. I can't wait to test it. But, alas, its snowing and -5 Fahrenheit. Thank you for your service to our country Mr. Blazek, and for your obvious business acumen in providing a good product and good customer support.